The output torque of a motor is 69.2 lb-ft when it operates at 950 rpm. Calculate...
The output torque of a motor is 69.2 lb-ft when it operates at 950 rpm. Calculate the losses in the machine and its efficiency if, under this condition, the power input is 10900 watts.
Topic: DC MOTOR: Efficiency and Power Losses
Homework Answers
Result:
Output power = 9333.7 watts
Losses = 1566.3 watts
Efficiency = 85.63%
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The output torque of a motor is 69.2 lb-ft when it operates at
950 rpm. Calculate...
QUESTIONS Question-3: Draw "speed vs. torque" curve using data in Table-1. The completed graph represents the speed vs. torque characteristics of a typical DC shunt-wound motor. Terax Qu...
QUESTIONS Question-3: Draw "speed vs. torque" curve using data in Table-1. The completed graph represents the speed vs. torque characteristics of a typical DC shunt-wound motor. Terax Question-4: Calculate the speed regulation (full load - 12 lbf.in) using the equation: 2-143) 143 (no load Regulation (full load speed) Speed regulation- % Part-II - Motor Efficiency Calculation: Set the dynamometer control knob at its full CW position (to provide the maximum starting load for the shunt-wound motor). Turn on the power...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When you connect it to a 24 V supply, under no-load conditions it spins at 2,000 rpm. With the same 24 V supply, when the motor is stalled, the input current is 50 A. i) Calculate the back-emf constant and hence the stall torque of the motor. Find also the armature resistance. [3 marks ] ii) The DC motor has a rated input current of...
An armature-controlled dc motor operates at steady state, with an armature drive voltage va = 10 ...
An armature-controlled dc motor operates at steady state, with an armature drive voltage va = 10 V. The motor runs at 600 rpm, and the armature current is found to be ia = 0.2 A. The armature resistance is Ra = 15 Ω. Determine: (a) The torque constant km of the motor (b) Electrical damping constant be (c) The efficiency under the given operating conditions, if the mechanical damping constant is bm = 8.25 × 10−5 N ⋅ m/rad/s (d)...
Q5.8：The specifications of machine 5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is ze...
Q5.8：The specifications of machine
5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is zero (stall condition) (i)induced voltage (ii) nput current (ii) output torque (iv) ut power (v)output power (vi) efficiency (d) he speed (in rpm) when the torque is 0.2 Nm 5 A DC machine has a no-load speed of 10,000 rpm and a rated speed of 8,000 rpm when operating with its rated supply...
need the answer for the question no. 1 ENGR 113 Homework DC Motor Objectives Plot the...
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently installed horizontal 42"-belt that is one mile long. The production rate of the system should be 500 tph when the belt moves 308 fpm. The speed reduction mechanism used is a v-belt with sheaves, and the material density is 150 lbs/ft?
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100...
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100 12, and negligible rotational losses. Under certain load conditions, the shunt motor runs at 1600 rpm while drawing a total current, I = 100 A. Determine: a. the output power of the motor; b. the output torque in N-m; and, c. the efficiency Without making any changes to the applied voltage or the field, the motor operates with a new M mechanical load that...
A diesel engine gives an output torque of 1,740 ft-lbf at an engine speed of 1,200...
A diesel engine gives an output torque of 1,740 ft-lbf at an engine speed of 1,200 rpm. If the fuel consumption rate was 31.5 gal/hr, what is the Input , output power and overall efficiency of the engine?
An ac electric motor drives a dc electric voltage generator. If the motor operates a an...
An ac electric motor drives a dc electric voltage generator. If the motor operates a an efficiency of 90% and the generator at an efficiency of 80%, and if the input power to the motor is 5 kW, what is the output power of the generator?
I want to solve this problem step by step. Thanks (35 points) Induction Generator Real Power Generation. A three phase, 220V line to line, six pole, 60Hz, wye connected induction machine op...
I want to solve this problem step by step. Thanks
(35 points) Induction Generator Real Power Generation. A three phase, 220V line to line, six pole, 60Hz, wye connected induction machine operates at rated voltage as a generator at a slip of-0.04. Its equivalent circuit parameters are the same as those in problem #1. The input mechanical power at the rotor (this is a generatorl) is 5.2kW. The core losses are 200Watts; friction and windage losses are 17 Watts; treat...
QUESTIONS Question-3: Draw "speed vs. torque" curve using data in Table-1. The completed graph represents the speed vs. torque characteristics of a typical DC shunt-wound motor. Terax Question-4: Calculate the speed regulation (full load - 12 lbf.in) using the equation: 2-143) 143 (no load Regulation (full load speed) Speed regulation- % Part-II - Motor Efficiency Calculation: Set the dynamometer control knob at its full CW position (to provide the maximum starting load for the shunt-wound motor). Turn on the power...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When you connect it to a 24 V supply, under no-load conditions it spins at 2,000 rpm. With the same 24 V supply, when the motor is stalled, the input current is 50 A. i) Calculate the back-emf constant and hence the stall torque of the motor. Find also the armature resistance. [3 marks ] ii) The DC motor has a rated input current of...
Q5.8：The specifications of machine
5.8. For the machine in the previous question, calculate (a) its no-load speed (b)its rated efficiency-olcoxL-n/nN (c) the following when the speed is zero (stall condition) (i)induced voltage (ii) nput current (ii) output torque (iv) ut power (v)output power (vi) efficiency (d) he speed (in rpm) when the torque is 0.2 Nm 5 A DC machine has a no-load speed of 10,000 rpm and a rated speed of 8,000 rpm when operating with its rated supply...
need the answer for the question no. 1
ENGR 113 Homework DC Motor Objectives Plot the Torque-Speed curve for a given DC motor given the stall torque and no load speed values Calculate the rotational power for a DC motor given the stall torque and no load speed values Plot the rotational power on a Torque-Speed curve to see the relationship between torque, speed, and power Calculate the maximum efficiency of a DC motor. Calculate the operating point for a...
Calculate the rpm needed for a motor with 280 ft-lbs of torque to drive a permanently installed horizontal 42"-belt that is one mile long. The production rate of the system should be 500 tph when the belt moves 308 fpm. The speed reduction mechanism used is a v-belt with sheaves, and the material density is 150 lbs/ft?
A 220 V DC shunt motor has an armature resistance, Re-0.1 S2, a field resistance, Ry=100 12, and negligible rotational losses. Under certain load conditions, the shunt motor runs at 1600 rpm while drawing a total current, I = 100 A. Determine: a. the output power of the motor; b. the output torque in N-m; and, c. the efficiency Without making any changes to the applied voltage or the field, the motor operates with a new M mechanical load that...
I want to solve this problem step by step. Thanks
(35 points) Induction Generator Real Power Generation. A three phase, 220V line to line, six pole, 60Hz, wye connected induction machine operates at rated voltage as a generator at a slip of-0.04. Its equivalent circuit parameters are the same as those in problem #1. The input mechanical power at the rotor (this is a generatorl) is 5.2kW. The core losses are 200Watts; friction and windage losses are 17 Watts; treat...
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